Don't run out of propane. Serious safety hazards, including fire or explosion can result. If an appliance valve or a gas line is left open when the propane supply runs out, a leak could occur when the system is recharged with propane. Air and moisture could get into an empty or depleted storage tank, which can cause rust build-up inside the tank. Rust can decrease the concentration of the odor of propane, making it harder to smell. If your propane tank runs out of gas, any pilot lights on your appliances will go out. This can be extremely dangerous if not handled properly. If your tank runs out of gas, a leak check must be performed by us. If on one of our routes, this would not be your fault so we will not charge for the leak check. If you are not on a route there will be a charge for the leak test.